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Leonardo da Vinci's sketches of a fetus in the womb, made between 1510 and 1513. | The Royal Collection (c) 2012, Her Majesty Queen Elizabeth II
History

Human Body Part That Stumped Leonardo da Vinci Revealed

Human body part that stumped Leonardo da Vinci is revealed. Learn more about the human body part that stumped Leonardo da Vinci in this article.

November 27, 2012
3:00 AM EST

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